Water jet pump



O. A. PARKER WATER JET PUMP April 17, 1956 Filed Jan.' 12, 1955INVENTOR. 012451. A. AR/(ER United States Patent O WATER JET PUMP OrrelA. Parker, Shaker Heights, Ohio Application January 12, 1955, Serial No.481,322 Claims. (Cl. 103-262) The present invention is an improved waterjet pump which, in general respects, is similar to the one thatconstitutes the subject matter of Letters Patent No. 2,215,132, grantedto me on September 17, 1940.

a My present invention, like its predecessor, is used in conjunctionwith a garden hose for administering a liquid treatment to lawns andother such areas in the customary act of sprinkling, and it is adaptedto be interposed between a water supply, such as a faucet, and the hose,and to have communicative connection, through a hose ofsmaller diameterand shorter length, with a container that holds a supply of the liquidtreatment in highly concentrated form. The treatment may consist of asoluble chemical liquid fertilizer, insecticide, or fungicide. However,I wish it to be understood that the invention is not limited to thehandling of a secondary liquid of this particular class.

The general object of my present invention is to provide a highlyeflicient jet pump that is of simple construction; that is inexpensiveto manufacture, and that may be conveniently cleaned, the same beingcomposed of relatively few parts that are capable of being assembled anddisassembled easily and quickly, and that are desirably made ofnon-corrosive materials so as to be unaffected by various chemicals,including mercuric and mercurous chlorides.

Jet pumps are characterized by a main pressure passage and a branchsuction passage, and in adapting such devices to my purpose it is foundadvantageous to include a check valve for preventing reverse flowthrough the suction passage in the event excessive back pressure buildsup within the main passage. Otherwise, under such circumstances, theconcentrated solution would become diluted and the container holding thesame would be caused to overflow. Therefore, it is another object of myinvention to provide, in a jet pump, an extremely simple and inexpensivecheck valve that is thoroughly reliable; that is durable in service, andthat is readily accessible for inspection, cleaning and replacement.

The foregoing objects are attained in the embodiment of the inventionillustrated in the accompanying drawing wherein Fig. 1 is a view showingmy improved jet pump attached to a faucet, which provides the watersupply, and in communication with a container that holds a quantity ofthe liquid treatment, a section of hose being connected to the pump andthrough which the mixture of water and treatment is distributed;

Fig. 2 is a side elevational view of the pump;

Fig. 3 is a central longitudinal section through the same, substantiallyon the line 3-3 of each of Figs. 4 and 5, and

Figs. 4 and 5 are sections on the line X-X of Fig. 3 looking,respectively, in the direction of the arrows 4 and 5.

Describing the invention by the use of reference characters, 1designates, generally, the body member of the 2,741,997 Patented Apr.17, 1956 pump. This member is desirably made, as by molding, of anon-corrosive material, such as a plastic that will not be affected bystrong chemicals. The body member terminates at one end in an internallythreaded cylindrical flange 2 for connection with the threaded end of afaucet, or to the threaded part of a hose coupling in instances where ahose provides the water supply. The flange 2 istsho-wn as having ribs 3on its exterior for the obvious purpose of affording a better grip whenapplying the pump to a faucet or hose connection; The body memberterminates at its opposite end in an externally threaded boss 4 for thereception of a conventional hose connection.

At the base of the threaded flange 2, on the interior thereof, the bodymember is provided with an annular shoulder 5 that surrounds a shallowcircular depression, the peripheral wall of which is shown as flared inthe direction of the flange 2. Fitting within this shallow flareddepression is a plate or disc 6, also desirably of plastic. The disc 6is provided with a central aperture 7 that opens through the side of thedisc toward the flange 2, While the opposite side of the disc is formedwith a shallow recess 8 that is somewhat greater in diameter than, andis concentric with, the aperture 7.

10 denotes a main pressure passage that extends axially through the bodymember 1, and the inlet end of said passage is of substantially the samediameter as the recess 8 wherewith it registers, so that said recessconstitutes an extension of the main passage. This passage, adjacent itsinlet end, is shown as cylindrical for a distance from the disc 6, andtherebeyond as flaring toward its outlet end. An annular chamber 14 ofsubstantial depth opens through the circular wall of the beforementioneddepression, in concentric relation to the inlet end of the passage 10.Communication between the main pressure passage 10 and the chamber 14 isprovided by a channel 15 in the disc 6 that extends radially from therecess 8, as shown in Figs. 3 and 5. An. extension or hose connection 16projects laterally from the body member 1, and through it extends abranch suction passage 17 that opens at-its inner end through theperipheral Wall of the annular chamber 14. A check valve 18 preventsreverse or back flow through the branch passage 17 and, in its presentpreferred form, it consists of a short length of standard tubing ofnatural or synthetic rubber that floats, so to speak, within the chamber14, and upon initial reverse flow of liquid through said chamber, thevalve 18 snaps against and yields to the contour of the peripheral Wallof the chamber about the inner end of the branch passage 17 and is heldagainst said wall as long as back pressure prevails within the chamber.

In order to reduce the weight of the body member and effect some savingin material, a relatively deep annular channel 20 is formed in the bodymember and opens through the end thereof about the outlet end of themain passage 10.

It is evident from the foregoing construction that the valve 18 isconfined within the chamber 14 by the disc 6; and that said disc, inturn, is held in place by a washer 21 that fits tightly within thethreaded flange 2, adjacent the base thereof, and overlies the marginalportion of the disc. Thus the parts of the structure are held inassembled relation by said washer, and upon removal of the washer, thedisc 6 and valve 18 may be readily withdrawn for inspection andcleaning.

Also, since the plastic parts are preferably molded, accuracy andeconomy of production are assured, and these ends are further advancedby the use of a standard hose washer for the part designated 21, and apiece of conventional tubing of natural or synthetic rubber for thevalve 18. i

In preparing to use the invention in a hookup like that illustrated inFig. l, the flanged end of the jet pump is screwed onto the faucet 23,and a section of garden hose 24 is attached, by the conventionalconnection 2.5, to the boss 4 of the pump. A relatively small tube orhose 25 has one of its ends frictionally engaged over the extension orhose connection in of the pump and its opposite end, to which a strainer27 of stainless steel or other noncorrosive material is attached,dropped into a container 39 that holds a quantity of concentratedsolution that forms the trea ment that is to be applied, with the water,to a lawn or other planted area by means of the hose 24. The container30 may consist of an ordinary pail, and since the jet pump is interposedbetween the faucet and the inlet end of the hose 2d and hascommunicative connection with the container 36) through the relativelyshort hose 26, the container may be left in one position while shiftingthe outlet end of the hose 24 about in the sprinkling of an entire areathat is capable of being reached by the hose. In practice, the length ofthe hose 24 should not exceed approximately fifty feet.

Thus, my invention is distinguished from those types of aspirators thatare attached to the outlet end of the hose, and which makes it necessaryfor the user to carry the container for the treatment about with him asthe sprinkling progresses. With my invention, the treatment isadministered in the customary manner of sprinkling, and the water, withthe treatment therein, is applied at about the usual rate as to speedand quantity. A further advantage of having the pump interposed betweenthe water supply and hose is that the treatment is thoroughly mixed withthe water before it reaches the outlet end of the hose.

Having thus described my invention, what 1 claim is:

1. In a jet pump, a body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward its outlet end,the body member having a chamber that opens through a surface of saidmember adjacent the inlet end of said main passage, a plate positionedupon said surface, said plate having an orifice in register with theinlet end of the main passage, restricted areas of said surface and saidplate being spaced apart to provide a passageway through which saidchamber communicates with the main passage, the aforesaid branch passageopening at its inner end into said chamber, and a flap valve confined insaid chamber by said plate for engagernnct over the inner end of thebranch passage.

2. in a jet pump, a body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward its outlet end,the body member having a chamber that opens through a surface of saidmember adjacent the inlet end of said rain passage, a plate positionedupon said surface, said plate having an orifice in register with theinlet end of said main passage, restricted areas of said surface andsaid plate being spaced apart to provide a passageway through which saidchamber communicates with the main passage, the aforesaid branch passageopening at its inner end into said chamber, a valve confined in saidchamber by said plate for engagement over the inlet end of the branchpassage, an internally threaded flange defining one end of the bodymember and surrounding the aforesaid surface, and a Washer of pliablematerial holdingly engaged within said flange and serving to retain saidplate adjacent said surface.

3. In a jet pump, a body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward its outlet end,the body member having an annular chamber that opens through a surfaceof said member surrounding the inlet end of said main passage, a platepositioned upon said end surface, said plate having an orifice inregister with 4 the inlet end of the main passage, the plate beingprovided with a radial channel through which the main passagecommunicates with said annular chamber, the aforesaid branch passageopening at its inner end into said chamber through the peripheral Wallof the latter, and a flap valve afloat in said chamber.

4. In a jet pump, the combination and arrangement of parts defined claim3, wherein the body member includes an internally threaded flange thatsurrounds said surface, and a washer of pliable material confined withinsaid flange and overlying the edge portion of said plate and serving tohold the plate upon said surface.

5. In a jet pump, a body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward its outlet end,the body member having an annular chamber that opens through a surfaceof said member surrounding the inlet end of said main passage, a platepositioned upon said surface, said plate having an orifice in registerwith, and of smaller cross sectional area than, the inlet end of themain passage, the plate having a recess in the side thereof adjacentsaid main passage that constitutes an extension thereof of slight depth,the plate being further provided with a radial channel through which theextension of the main passage communicates with said annular chamber,the aforesaid branch passage opening at its inner end into said chamberthrough the peripheral wall of the latter, and a flap valve consistingof a tube of pliable material afloat in said chamber.

6. In a jet pump, the combination and arrangement of parts defined byclaim 5, wherein the body member includes an internally threaded flangethat surrounds said surface, and a washer of pliable material confinedwithin said flange and overlying the edge portion of said plate andserving to hold the plate upon said surface, the end of the body remotefrom said flange incorporating hose attaching means.

7. In a jet pump, a body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward its outlet end,the body member having an annular chamber that opens through a surfaceof the body member surrounding the inlet end of said main passage, thebody member having a shallow depression throughout the central region ofsaid surface and extending radially outwardly beyond the annularchamber, a disc occupying said depression and having an orificeregistering with the inlet end of the main passage, the peripheral Wallof the depression flaring outwardly and the edge portion of the discbeing shaped complementary thereto, the disc being provided with aradial channel through which said main passage communicates with theannular chamber, the aforesaid branch passage opening at its inner endthrough the peripheral wall of the annular chamber, a flap valve in saidannular chamber for engagement overthe inner end of the branch passage,the body member having a lateral extension through which the branchpassage opens exteriorly of said chamber and that is shaped to provide aconnection for a hose, the body including an internally threaded flangethat surrounds the aforesaid surface, and a washer of pliable materialconfined by said flange adjacent said end surface and overlying the edgeportion of the disc.

8. in a jet pump, body member characterized by a main pressure passageand a branch suction passage, the main passage extending through thebody member and enlarging in cross sectional area toward. its outletend, the body member having an annular chamber that opens througl'i asurface of the body member surrounding the inlet end of said mainpassage, the body member having a shallow depression throughout thecentral region of said surface and extending radially outwardly beyondthe annular recess, disc occupying said depression and having an orificein substantially concentric relation to,

and of smaller cross sectional area than, the inlet end of the mainpassage, the disc being provided with a shal' low recess in axialalignment with said orifice that registers with and constitutes anextension of the main passage, the disc being further provided with aradial channel through which said recess communicates with the annularchamber, a flap valve consisting of a tube of pliable material afloat insaid annular chamber, the aforesaid branch passage opening at its innerend into said annular chamber through the peripheral wall thereof, thebody member having a lateral extension through which the branch passageopens exteriorly of said chamber and that is shaped to provide aconnection for a hose, the body including an internally threaded flangethat surrounds the aforesaid surface, and a washer of pliable materialconfined by said flange adjacent said surface and overlying the edgeportion of the disc.

9. A jet pump comprising a body member that terminates at one end in aninternally threaded flange and at its opposite end in an externallythreaded boss, said flange surrounding a surface of the body membercharacterized by a shallow circular depression, the body member havingan axial main pressure passage that opens at its inlet end into saiddepression and that enlarges toward its outlet end where it opensthrough the end of the body constituted of the aforesaid externallythreaded boss, the body member having an annular chamber that surroundsthe inlet end of the main passage and that opens into the aforesaiddepression, the body member being provided With a lateral extension, andhaving a branch suction passage disposed axially of said extension andthat opens at its inner end into said annular chamber through theperipheral wall thereof, a disc fitting within the aforesaid depressionand having a central aperture in axial alignment with the main passage,the disc being provided with a radial channel through which the mainpassage communicates with the annular chamber, a sleeve-like flap valveof pliable material o-ccupying the annular chamber for limited movementin all directions therein, and a washer of pliable material confinedwithin the aforesaid flange adjacent said surface and overlying the edgeportion of the disc.

10. A jet pump comprising a body member that terminates at one end in aninternally threaded flange and at its opposite end in an externallythreaded boss, said flange surrounding a surface of the body membercharacterized by a shallow circular depression defined in part by anedge Wall that flares outwardly in the direction of said flange, thebody member having an axial main pressure passage that opens at itsinlet end into said depression and that enlarges toward its outlet endwhere it opens through the end of the body member constituted of theaforesaid externally threaded boss, the body member having an annularchamber surrounding the inlet end of the main passage and that opensinto the aforesaid depression, the body member being provided with alateral extension, and having a branch suction passage disposed axiallyof said extension and that opens at its inner end into said annularchamber through the peripheral wall thereof, a disc complementary to andoccupying the aforesaid depression and having a central aperture inaxial alignment with the main passage, the side of the disc adjacentsaid passage having a recess substantially concentric with the apertureand that con stitutes an extension of the main passage, the disc beingprovided, also, with a radial channel through which said recesscommunicates with the annular chamber, a sleevelike flap valve ofpliable material occupying the annular chamber for limited movement inall directions therein, and a washer of pliable material confined withinthe aforesaid flange adjacent said surface and overlying the edgeportion of the disc.

No references cited.

